0000000000149527

AUTHOR

M. Petrick

showing 4 related works from this author

On-line commissioning of SHIPTRAP

2006

Abstract The on-line commissioning of the Penning-trap mass spectrometer SHIPTRAP was successfully completed with a mass measurement of holmium and erbium radionuclides produced at SHIP. A large fraction of contaminant ions created in the stopping cell was identified to originate from the buffer-gas supply system. Using a liquid nitrogen cold trap they were reduced to a tolerable amount and mass measurements of Er 147 , Er 148 , and Ho 147 with relative uncertainties of about 1 × 1 0 − 6 were performed.

010308 nuclear & particles physicsAnalytical chemistrychemistry.chemical_elementLiquid nitrogen[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]Condensed Matter PhysicsMass spectrometryPenning trap01 natural sciencesAtomic massIonMasschemistry07.75.+h; 21.10.Dr0103 physical sciencesPhysical and Theoretical Chemistry010306 general physicsHolmiumInstrumentationSpectroscopyCold trap
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Rate capability of a cryogenic stopping cell for uranium projectile fragments produced at 1000 MeV/u

2016

At the Low-Energy Branch (LEB) of the Super-FRS at FAIR, projectile and fission fragments will be produced at relativistic energies, separated in-flight, energy-bunched, slowed down and thermalized in a cryogenic stopping cell (CSC) filled with ultra-pure He gas. The fragments are extracted from the stopping cell using a combination of DC and RF electric fields and gas flow. A prototype CSC for the LEB has been developed and successfully commissioned at the FRS Ion Catcher at GSI. Ionization of He buffer gas atoms during the stopping of energetic ions creates a region of high space charge in the stopping cell. The space charge decreases the extraction efficiency of stopping cells since the …

Nuclear and High Energy PhysicsEXTRACTIONFissionBuffer gasION-CATCHER01 natural sciencesSpace chargeIonHEAVY-IONSNuclear physicsMOBILITIESElectric fieldIonization0103 physical sciencesRate capabilityddc:530SPECTROMETER010306 general physicsNuclear ExperimentInstrumentationSUPER-FRSHIGH-PRECISION EXPERIMENTSta114010308 nuclear & particles physicsChemistryProjectileBEAMSPERFORMANCEGAS CELLSpace chargeExtraction efficiencyExtraction timeCryogenic gas-filled stopping cellAtomic physicsBeam (structure)Nuclear Instruments & Methods in Physics Research Section B-Beam Interactions with Materials and Atoms
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The FRS Ion Catcher

2013

At the FRS Ion Catcher at GSI, projectile and fission fragments are produced at relativistic energies, separated in-flight, range-focused, slowed down and thermalized in a cryogenic stopping cell. A multiple-reflection time-of-flight mass spectrometer (MR-TOF-MS) is used to perform direct mass measurements and to provide an isobarically clean beam for further experiments, such as mass-selected decay spectroscopy. A versatile RF quadrupole transport and diagnostics unit guides the ions from the stopping cell to the MR-TOF-MS, provides differential pumping, ion identification and includes reference ion sources. The FRS Ion Catcher serves as a test facility for the Low-Energy Branch of the Sup…

Nuclear and High Energy PhysicsPhysics::Instrumentation and DetectorsFissionMass spectrometry01 natural sciencesIonHEAVY-IONSNuclear physicsENERGYGSI0103 physical sciencesddc:530NuclideNuclear Experiment010306 general physicsInstrumentationSUPER-FRSDirect mass measurementta114010308 nuclear & particles physicsChemistryProjectileMultiple-reflection time-of-flight mass spectrometerExtraction timeTIMECryogenic gas-filled stopping cellQuadrupoleISOBAR-SEPARATIONFacility for Antiproton and Ion ResearchAtomic physicsProjectile fragmentationBeam (structure)Exotic nucleiSYSTEMNuclear Instruments & Methods in Physics Research Section B-Beam Interactions with Materials and Atoms
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First experimental results of a cryogenic stopping cell with short-lived, heavy uranium fragments produced at 1000 MeV/u

2013

A cryogenic stopping cell (CSC) has been commissioned with U-238 projectile fragments produced at 1000 MeV/u. The spatial isotopic separation in flight was performed with the FRS applying a monoenergetic degrader. For the first time, a stopping cell was operated with exotic nuclei at cryogenic temperatures (70 to 100K). A helium stopping gas density of up to 0.05mg/cm(3) was used, about two times higher than reached before for a stopping cell with RF ion repelling structures. An overall efficiency of up to 15%, a combined ion survival and extraction efficiency of about 50%, and extraction times of 24ms were achieved for heavy a-decaying uranium fragments. Mass spectrometry with a multiple-r…

Materials scienceGeneral Physics and Astronomychemistry.chemical_elementMass spectrometry7. Clean energy01 natural sciencesIonNuclear physicsENERGYGSIION-OPTICAL SYSTEMS0103 physical sciencesddc:530010306 general physicsSpectroscopySUPER-FRSHeliumSHIPTRAPCATCHER010308 nuclear & particles physicsProjectileExtraction (chemistry)UraniumBEAMSTIMEchemistryFLIGHT MASS-SPECTROMETRYMATTEROverall efficiencyEurophysics Letters
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